I tried one of the Gripmaster leather grips years ago. It was incredibly tacky. So much so I felt like there was pine tar and I should wash my hands. They seemed like they would last forever, but I didn't really care for the feel overall.
I think they discontinued them, but I put their fake leather grips on some clubs for a golf league buddy of mine at least 5-6 years ago....he actually texted me this week and said they are finally wearing out and need to be replaced lol.